- Astronomical Observatory of RomeIT1 paper
- Consejo Superior de Investigaciones CientíficasES1 paper
- Heidelberg UniversityDE1 paper
- Institute of Astronomy and National Astronomical ObservatoryBG1 paper
- Instituto de Astrofísica de CanariasES1 paper
- Istituto Nazionale di Fisica Nucleare, Galileo Galilei Institute for Theoretical PhysicsIT1 paper
- Max Planck Institute for AstronomyDE1 paper
- National Institute for AstrophysicsIT1 paper
- Sapienza University of RomeIT1 paper
- Sofia University "St. Kliment Ohridski"BG1 paper
- Ss. Cyril and Methodius University in SkopjeMK1 paper
- Universidad de La LagunaES1 paper
1 paper